as far as I know

來源: 用戶名被占用了 於 2011-02-23 13:45:39 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (256 bytes)
回答: thanks. GPS 能不能算出高度？ 由 433832795028 於 2011-02-23 13:39:41

They all use air pressure to measure the altitude. It means they all use barometer. It takes a reference point at ground level, then measure the difference.

Aircraft altimeter converts the air pressure to altitude. Capable GPS does the same.

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• 哦 -433832795028- ♂ 給 433832795028 發送悄悄話 (0 bytes) () 02/23/2011 postreply 13:48:42

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• 測高度溫度有的手表都帶 -歌唱家- ♂ 給 歌唱家 發送悄悄話 (69 bytes) () 02/23/2011 postreply 14:01:45

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